Policy Routing for Incomming Traffic

Hi

I would like to know the Possibility of routing the Incomming traffic from Public Network(Wan) based on the Source IP to different Destinations of Internal Lan ,

Example

I Had two application servers ( say web on port 80 ) configured with two ips Internally

( say Ip 192.168.1.100, & 192.168.1.101 )

and i do have Public  ip (Say PIP) , which is mapped its port 80 to 192.168.1.100 as ( Virtual IP settings )

My queries that  out of the traffic coming on the PIP , can i forword the Traffic from a particular  external server /IP/FQDN/Range

to a different internal server 192.168.1.101 instead of the mapped one(192.168.1.100)

can any one help in this regards

Thanks in advance

Eldo Paulose